Reverse Proxy routing based on directory in URL

[francislavoie]

Yes, you can use handle_path to strip the path prefix before proxying:

site.mymaindomain.com {
	handle_path /nr* {
		reverse_proxy 55.66.77.88:1880
	}

	handle {
		reverse_proxy 11.22.33.44:80
	}
}

handle_path (Caddyfile directive) - Caddy Documentation

Keep in mind though, this isn’t bullet-proof because any URLs in HTML that the upstream app responds with may not work unless the app is configured to prefix them with /nr. This isn’t something you can solve easily with Caddy config. See this article for an explanation:

The "subfolder problem", OR, "why can't I reverse proxy my app into a subfolder?"

Have you ever tried to reverse proxy an app into its own little subfolder of your domain name? Makes things neat, doesn’t it? Using example.com/foo/ for one app, example.com/bar/ for another. If you’re coming here from one of the selfhosted communities, you might be thinking along the lines of example.com/sonarr/, example.com/radarr/ etc. Chances are, you’ve tried some configuration along these lines: example.com { redir /sonarr /sonarr/ handle_path /sonarr/* { reverse_proxy localhost…